<template>
    <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model="title" @keyup.enter="add"/>
    </div>

</template>

<script>
import {nanoid} from 'nanoid';
export default {
    name:'MyHeader',
    data(){
        return {
            title:''
        }
    },
    props: ["todos"],
    methods:{
        add(event){
            if (!this.title.trim()){
                alert('输入不能为空');
                return;
            }
            this.todos.unshift({"id": nanoid(), "title": this.title, "done": false})
            event.target.value = "";

        }
    }
}
</script>
<style scoped>

/*header*/
.todo-header input {
    width: 560px;
    height: 28px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 4px 7px;
}

.todo-header input:focus {
    outline: none;
    border-color: rgba(82, 168, 236, 0.8);
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}

</style>
